Have you ever wondered why mushrooms are so expensive and seem like an elitist food? Why would a fungus cost more than beef and fish? How nutritious could this delicacy be? Well, wonder no more. All types of edible mushrooms contain varying degrees of protein and fibre. They also contain B vitamins as well as selenium, which helps to support the immune system and prevent damage to cells and tissues. Mushrooms are being increasingly researched and used for their important health benefits with different varieties having different medicinal properties.